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I have a new wireless printer installed on my local network. Its scanning function is blocked -- the printer is not seen -- but printing works fine. Disabling Malwarebytes, with no other changes, allows the scanning function to work in the same session. The vendor (Brother) indicates which specific UDP ports need to be opened to enable the scanning function; these are different than the UDP ports needed for printing. How can I configure MB to unblock these ports? My regular antivirus (still running) does not block the scanning function.

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What happens if you just disable the Web Protection component in Malwarebytes? Does the scanner work then? To test, right-click on the Malwarebytes tray icon in the notification area near your system clock and click where it says Web Protection: On and click Yes when prompted by User Account Control. Wait about 30 seconds for it to fully disable the component (it has to unload the driver and block databases from memory) then test to see if the scanner now functions.

Please let us know how it goes.

Thanks

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Success... simply setting Web Protection to "Off" restores the scanner functionality for the wireless network printer. What would be the recommended way to force a default to this setting on system reboot?

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You can simply leave it disabled, but theoretically we should be able to accomplish this fix without completely disabling Web Protection. I just wanted to verify that this module was indeed the cause. If your scanner uses a specific executable to function then you should be able to exclude it from Web Protection to allow the scanner to function while Web Protection is active. If you know what that file/process is called and where it is located (I assume it shows up in Task Manager whenever the scanner is active) then you should be able to exclude it according to the instructions under the Exclude an Application that Connects to the Internet section of this support article.

If you have trouble finding it, then please make certain your scanner is active and do the following:

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I cannot identify the file / process that needs to be identified as an exclusion. I did guess at c:\Program Files (x86)\Browny02\Br\BrYNSvc.exe and also C:\Program Files (x86)\ControlCenter4\BrCtrlCntr.exe, but that was not sufficient. Thus there must be some further process different from or in addition to either or both of these. Perhaps you can identify it from the enclosed log files. I would like to proceed with identifying specific exclusions (with your help) but without completely disabling Web Protection.

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I'm just guessing as well unfortunately (I wish companies would label/specify the functions of individual executables/files better than they do) but I'd suggest trying to exclude each of these one at a time until you are successful and hopefully one of them does the trick:

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I'm afraid that even with all of the Brother-related files excluded from detection, the scanner functionality will not work unless I set Web Protection to "Off". FYI, the one System32 file seemed to be related to Bluetooth, not to Brother, and I did not exclude it.

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OK, thanks for letting me know. I was hoping we'd be able to find a solution but it seems likely that the Web Protection component is somehow interfering with the scanner's communication, possibly on a driver level and if that is the case it means we can't exclude it as driver's cannot be excluded from Web Protection.

In the meantime I guess you'll just have to disable Web Protection whenever you're going to use your scanner. I will report this issue to the Developers and hopefully they will be able to resolve the issue in a future release.

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Malwarebytes doesn't block any specific ports so I'm sure that's not the issue. It is probably interfering somehow on a programmatic level with the scanner's driver preventing it from communicating. Thanks for the additional info though; it may help the Developers to track down the root cause of the issue.

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This issue might be resolved by the new beta build of Malwarebytes, version 3.8. You can learn more about it here.

If you decide you wish to give the beta a try then please open Malwarebytes and navigate toSettings>Applicationand scroll to the bottom of the tab where it shows the option to enable beta updates and select the option to do so and clickYesat the confirmation prompt then scroll back to the top of the same tab and click on theInstall Application Updatesbutton and allow it to download and install the new build, allowing it to restart your system if prompted to do so once the installation completes, making sure that you save anything you were working on before you do.

If you do try the beta, please let us know if it resolved the issue you were experiencing or not.

Thanks

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I installed version 3.8.1.2950 and indeed found that it solved the problem with the scanner functionality. Now I can leave Web Protection enabled and still be able to activate the wireless scanner from Windows, or alternatively initiate a scan from the device.